package com.itheima.youdianda.config;

import com.itheima.youdianda.common.JacksonObjectMapper;
import com.itheima.youdianda.entity.ExcludeUrl;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import java.util.List;

@Configuration
@Slf4j
public class WebMvcConfig extends WebMvcConfigurationSupport {

    @Autowired
    private ExcludeUrl excludeUrl;

    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        log.info("开始进行静态资源映射...");
        registry.addResourceHandler("/admin/**").addResourceLocations("classpath:/admin/");
        registry.addResourceHandler("/upload/**").addResourceLocations("classpath:/upload/");
    }
    @Override
    protected void addInterceptors(InterceptorRegistry registry) {
        log.info("拦截器");
        registry.addInterceptor(new LoginInterceptor()).addPathPatterns("/**").excludePathPatterns(excludeUrl.getPatternUrl());
    }


    /**
     * 扩展mvc框架的消息转换器(解决前端js导致的长整形精度损失的问题)
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        log.info("扩展消息转换器...");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将Java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架的转换器集合中
        converters.add(0,messageConverter);
    }
}
